Combined nozzle and pressure gauge



May 26, 1925.

c. F. CARTER COMBINED NozzLE AND 4Plvssufus GAUGE Filed Jan. 3l, 1925 brmby.

Patented uMay 26, 1925.

raam

ur 'asics CG'MBENED N'OZZLE AND RESSURE GAUGE.

Application led January 31, 1923. Serial No. 616,02.,

To all whom t may concern:

Be it known that l, @Hannes FRANCIS Can'rnn, a citizen of the United States of America., and aresident of Des Moines, county of Polk, and State of Iowa, have invented certain neu/and useful Improvements in Combined Nozzles and Pressure Gauges, of which the following is a full and clear specilication.,

My invention relates to combination valve stem engaging nozzles and tire pressure gauges and has to do more particularly with such devices as are used for filling and determining the pressure of pneumatic devices, such as automobile tires and the lllre.

llt has been customary to provide separate devices for filling' and noting the pressure of pneumatic tires, rllhis arrangement has been somewhat unsatisfactory and it is one of the objects of my invention to obviate the necessity of applying' a pressure gauge to a tire stem to measure the pressure in the tire, then the removal of the same and the application oit the nozzle .connected to the pressure tank or pump to increase the presu sure in the tire, and a reoperation of this cycle of operation until the desired pressure is had in the tire.

'With my invention, when the combined nozzle and pressure gauge is applied .to the valve stem of the tire, the pressure 1s im mediately shown by the tire pressure gauge. It it is found that the pressure in the tire is not suliicient, the operator tlieuiactuates .a valve to permit air to enter the tire. The operator then releases the valve and the pressure in the tire 1s again registered on the tire-pressure gauge. 'lhis operation 1s repeated until the desired pressure is reached. The use of my combination tire filling nozzle and gauge, obviates the necesu sity of providing more than one tire gauge per each tire engaging" nozzle.

A further obiect of myinvention resides in the arrangement of the parts of my device so that the same may readily be applied to the valve stem of tires mounted on all types ot Wheels; especially truck Wheels and disc and Wire Wheels which are so constructed that it is practically impossible to apply vertically extending tire-pressure au g danother object of my invention is the provision of a guard for the valve operating member ot my device to protect the same against injury `forming a part hereof in which the same reference characters indicate like parts throughout the several views and in which: Figure 1 is a top-plan view of my device, Figure 2 is a side-plan view of my device, and

Figure 3 is a sectional view showing details ot' construction ot the same.

Referring to the annexed drawing, l repmain body portion and three separate conA nectmg members; 2 the nozzle or valve stem engaging member; 3 the member to which is attached the guard member which holdsI the tire pressure gauge; and l the member to which is attached the member connected to the air supply line These three members are preferably "formed integrally With the main body portion 5 which encloses the valve mechanism. rlhe housing member l, is provided with a guard member 6 for pro tecting the valve operatingl member 7., Bv having the pressure gauge and the air-line connection extending rearwardly, l am able to materially decrease the height 'of my device and to extend the nozzle 2 forwardly so that it may easily be applied to the tire valve stem of a pneumatic tire no matter' upon what type of Wheel the tine may be mounted., i

The guard 6 readily protects the valve operating member l against injury, should the device be dropped or mistreated. rlhe tirestem engaging member or nozzle is provided with ,the yusual gaslret or gripper 5l. for making; an air-tight connection with the valve stem, and a pin 9 is provided for opening the valve in the valve stem. The washer 10, which holds the pin 9, is provided vvith a plurality of small holes 1l about the pin 9 (only one of the holes is shown in the drawing). These holes, of course, readily provide'a passage way for Aresents a housing member consisting of a dll los

liti' chamber is provided with a valve for controlling the supply of air from the supply tank through the line connecton and the port 16 into the` lower chamber 14 and from this chamber through the port 17 into the upper chamber 13. The tire gauge protecting member18,holds the pressure gauge 19, which may be of any approved type, in position. 20 is the usual member to which is connected the hose which connects to the supply tank or pump. One end of the 1nember 20, is Screw threaded and adapted for engagement with the threads 22 cut in the member 23. A rubber gasket 25 is provided to make an air-tight connection. I also provide a flange 26 adapted to abut against member 23 to make a screw-tight connection. The gauge-guard member 18 has its one end threaded for screw-threaded engagement with the threads 26 cut in member 27. A gasket 28 is provided to make an air-tight connection between the gauge 19 and chamber 13. The guard is also provided with a flange 30 for abutment against member 27." In the upper chamber 13, the valve mechanism therein consists of a screwthreaded member 31 which has screwthreaded engagement with a piston or plunger 32. To the top of piston 32 is connected an operating button 7. Between the mem.- ber 31 and the piston 32, I provided a leather washer or plunger This plunger is held in place by the 'flange of member 31. Extending downwardly on member 31, is a `cylindrical portion 34, the function of which will be hereinafter explained. A spring 35 is provided to hold the piston 32 in its normal position. Piston 32 is rovided with /a shoulder 36 which abut-s against an annular nut or plug 37 which is provided with screw threads and adapted to engage the threads in the housing to holdy the piston 32 in position.

Thevwall 39, which separates the upper chamber from the lower chamber, is pro# vided with an annular orifice or port 17. Through this orifice extends the stem of the lower valve, which stem has a triangular cross section.` The stem 41 is provided with an annular' groove 42 which receives the gasket 43. rIhe gasket 43 abuts against the bottom face 44 of the partition 39 to prevent entrance of air 'from the lower chamber into the upper chamber. A coiled spring 38 is provided, .which cucire-les the cylindrical portion 47 of the valve and abuts against the flange portion 46 of the valve, to hold the valve in its normal position. A screw-threaded plug 49 is provided which has screw-threaded engagement with the housing member 1 to maintain the spring in position.

From this description it will be noted whereupon the pin 9 operates the valve in` the valve stem and permits the air from the tire to pass through the orifices 11 into the port 12 and through this port into the upper chamber 13 out of this chamber through the port 15 to the pressure gauge. The pressure gauge thus responds and indicates the air pressure in the tire. When it is desired to inflate the tire, the operator simply presses the button 7 which moves the piston 32 causing the same to close the port 15, and thus shutting ofi' the passage from the chamber 13 to the pressure gauge. The further operation of the piston 32 causes member 34 to engage valve member 41 operating it againstvthe pressure of the coiled spring 38 and the air pressure opening the passage from the lowe .chamber 14 into the upper chamber 13 thereby permitting air from the supply tank-to enter through port 16 into chamber 14, thLou-gh port 17 into ,the upper chamber 13, through port 12 and the orifices 11 in washer 10 into the tire. `When the operator relieves pressure upon the button 7,- the valve in the lower chamber closes to shut oli' the air supply, then the valve in the upper chamber .opens 'the port 15 to permit air to reach the gauge to indicate the pressure in the tire as-hereinbefore described.

It is thus seen that the .valves are operated in the proper sequence so as to prevent sud-den shocks that would otherwise occur if the pressure of the air line was permitted to pass directly into the pressure gauge. It is further seen that my device is so constructed as to render all the parts readily accessible 'for the purpose of repairs.

While I have shown the housing as a uni-y tary structure, it' may readily be formed.- of one main body portion, and the nozzle, gauge protecting member, and hose-connecting member be formed separately having se1e\\-tlneaded engagement with the main body portion of the housing.

In illustrating my invention, I have shown a specific embodiment, but I do not wish .to be limited to the exact structure as shown, as many modifications and changes may readily suggest themselves to those skilled in the art and, therefore, I aim to @over all such changes and modifications as come within the spirit and scope of the appended claim.

Having described my invention what I desire to secure by United States Lettersl Patent is:

An in lating device comprising a valve housing including an air hose nipple, a pressure gauge carried by the housing, valves in the housing for controlling the passage of air to a tire valve or the gauge, an operata:v ing button for the valves arranged externally of the housing, and a crescent shaped guard formed integrally with the housmg and partly surrounding and extending above said operating button to protect the same.

Signed by me at Des Moines, in the county of Polk and State of Iowa, this 26th day `off January, 1923.

CHARLES FRANCIS CARTER. 

